This triangle perimeter reference table shows the perimeter for a range of side a values, assuming a side b of 4 and a side c of 5. Every figure is computed with the same engine that powers our Triangle Perimeter Calculator, so the numbers are exact.
| Side a | Perimeter |
|---|---|
| 0.75 | 9.7500 |
| 1.5 | 10.5000 |
| 2.3 | 11.3000 |
| 3 | 12.0000 |
| 4.5 | 13.5000 |
| 6 | 15.0000 |
| 9 | 18.0000 |
| 15 | 24.0000 |
| 21 | 30.0000 |
| 30 | 39.0000 |
How to use this table
Find the row closest to your side a and read across to the perimeter. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Triangle Perimeter Calculator for a precise answer.
Need a value that is not in the table? — the Triangle Perimeter Calculator does it instantly, for free, with the formula and a worked example built in.
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